A control method of electronically controlled silicon oil fan clutch

Abstract

The invention relates to a control method of an electronic control silicone oil fan clutch. The method mainly includes the following steps of firstly, calculating the expected value of the rotating speed of a fan under the current working conditions of an engine according to an influence factor of the temperature of the engine; secondly, calculating the PWM duty cycle Duty_Cyc of the control overthe rotating speed of the fan in the current cycle; thirdly, sending the PWM cycle calibrated in advance and the PWM duty cycle Duty_Cyc of the control over the rotating speed of the fan in the current cycle to a PWM controller through an ECM, and adjusting the amount of silicone oil in a working cavity of the electronic control silicone oil fan clutch through the PWM controller to realize one time of adjustment of the rotating speed of the fan; and fourthly, executing the first step, the second step and the third step again to obtain the PWM duty cycle Duty_Cyc of the control over the rotating speed of the fan in each cycle, thereby realizing multi-stage adjustment of the rotating speed of the fan. By means of the method, the precision of the control over the rotating speed of the fan ishigh, noise is low, energy consumption is reduced, more oil is saved by the engine, and the fuel oil economical performance is greatly improved.

Description

technical field [0001] The invention belongs to the field of electronic function control for electronically controlled engines, and relates to an electronically controlled silicon oil fan clutch control method. Background technique [0002] The engine is the heart of the car, and its working status directly affects the power, fuel economy and emissions of the vehicle. With the rapid development of the automobile industry, engine functions are becoming more and more complex, including more and more accessories, and engine power is increasing, making the engine more vulnerable to high temperature threats. A good cooling system fan control method can not only ensure that the engine runs at the optimum temperature and stay away from the threat of high temperature, but also is one of the most effective measures to reduce the engine's ineffective energy consumption and improve the vehicle's economy and power. With the increasing demand of users for low emission, low noise and fue...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the existing ON / OFF switch control method cannot realize the multi-level speed regulation of the fan, and only considers the coolant temperature and the intake air temperature, and does not fully consider the vehicle speed, air-conditioning pressure, manual fan switch, engine braking, engine speed, Fuel temperature, OEM (Original Equipment Manufacturer) auxiliary pressure, OEM auxiliary temperature and other factors lead to poor cooling effect, high energy consumption, and high noise. The invention provides an electronically controlled silicon oil fan clutch control method

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